Gun mount



Dec. 13, '1949 s. G. GREEN ET Al.

GUN MGUNT Y Original Filed Dec. 31,` 1943 13 Sheets-Sheet l .-Dec. 13,1949 original Filedpeo. 31, 1945 s. G. GREEN ET AL.

GUN Mouw l5 Sheets-Sheet 2 WILL /HM EIA/f, WEBER QEVGRE) Dec. i3, 1949s. G. GREEN ET L GUN MOUNT 13 Sheets-Sheet 3 Original Filed Dec. 51,1943 GREEN,

Dec. 13, 1949 s. G. GREEN ET AL 2,491,005

GUN MOUNT original Filed Dec. 31, 1943 lasheets-sheet 4 www 2M a 1 RQW-btmmm Dec. 13, 1949 v s. G. GREEN ETAL 2,491,005

GUN MOUNT Original Filed Dec. 31, 1943 13 Sheets-Sheet 5 s l' c m y mln-I l G2 \5 l-J) Dec. 13, 1949 s. G. GREEN ETAL 2,491,005

GUN MOUNT original Filed Dec. :51, 1945 1:5 sheets-sheet e WHT-mh?" Dec.13, 1949 Y s. G. GRYEEN ErAL GUN MOUNT 13 Sheets-Sheet '7 v OriginalFiled Dec. 31, 1943 Dec. 13, 1949 s. G. GREEN E-rAL GUN MOUNT OriginalFiled Deo. 31, 1943 13 Sheets-Sheet 8 Dec. 13, 1.949 s. G. GREEN ET AL E2,491,005

GUN MOUNT Y Original Filed Dec 3l, 1943 13 She'ets-Sheet 9 WEBEROEI/ORE) Dec. 13, 1949 s. G. GREEN ET Al. 2,49LOO5 GUN MOUNT OriginalFiled Dec. 3l, 1943 15 Sheets-Sheet 10 Dec. 13, 1949 s. G. GREEN ETAL2,491,005

GUN MOUNT original Filed Dec. 31, 194s 15 sheets-sheet 11 glu/vantareDec. 13, 1949 s.`G.GREEN ET AL 2,491,005

GUN MOUNT Original Filed Deo. 31, 1943 13 Sheets-Sheet l2 Dec. 13, 1949s. G. GREEN ET AL 2,491,005

GUN MOUNT 13 Sheets-Sheet 13 Original Filed Dec. 31, 1943 Patented Dec.13, 1949 Samuel G. Green, Alexandria, Va.,and WalterlH. DArldcnne,Jenkintown .Manon William J. .MeineL Huntington Val-ley, :and WeberDevero, Horsham Township, Montgomery County., Pa., Aa'ssg-mn's, by-d-irect and `mesne assignrnents,to Heintz ,Manufacturing Company,Philadelphia, Pa., a corporation of Pennsylvania Original application-December 31, 1943, Serial Divided and this application .May

23,1946, SerialN'o. 671,8.'75

(Cl. Sil-42) 3 crains. 1

This application is .a division of copending application, Serial No.516,520, filed December .341, 1943, which issued .on July 30, .1946, asPatent No. 2,404,958.

rThis invention relates to gun mounts and more particularly to ashielded machine `gun mount primarily for anti-aircraft use and.employable at ease through 360D in traverse and .at all angles .from adepression to an elevation of +90". It is a principal object of .theinvention to k'provide such a mount.

1n the more modern and now conventional gun mounts for anti-aircraft useit has been necessary to employ `shoulder braces and back supports for`the gunner., for without such accessories the mounts could `not -bevoperated With any degree of eiciency. While this comprised an advantagein one sense, .the use of such `appendages possessed two principaldisadvantages. First, much of the recoil upon rng was trans-- mitteddirectly to the gunner, and secondly, the gunner was thus forced 'inoperation to assume a squatting and somewhat cramped position.

1t is another principal object of thisinvention to obviate thesedisadvantages and the present mount is so constructed and arranged sothat the gunner operates at all times from a. standing position whichresults in greater Afreedom of action, faster operation and greateraccuracy. Moreover, the arrangement makes .possible the elimvmation ofshoulder braces and back straps thus greatly reducing the amount ofrecoil shock transmitted to the gunner.

A further object of the invention .resides Ain providing such a mountwhich may be used either as a tripod or a Xed pedestal mount.

Moreover, the invention has for another object the provision of a mountthe 'pedestal suppor't construction o'f which is adapted, through aVnovel cushioning arrangement, to withstand shock and to dampen thevibration caused` by normal recoil thus increasing the .accuracy offire.

T'ne invention has for Van important object the provision of Ea, mountof relatively simple and rugged construction, comprised of a number .oflight weight components capable of easy transport and ready assembly.

7These and other important objects of the yinvention will become more.apparent .from the following description and claims when .read inconjunction with the Vaccompanying drawings, in which:

Figure 1 is a side elevation ofthe =preferred iorm of the invention.

Figure 2 is a frontview.

Figure 3 is a toppl'an'view.

`Figure 4 .is an elevational View, `partly in vsection,l of the pedestal'or stand.

.Figure 5 is a section taken on the line 5 5 lof Figure 4.

Figure 6 is a top plan view of the stand illustrated in Figure f4.

Figure '7 'is an 'enlarged detail of the bearing support shown in Figure'4.

Figure 8 .is fa section taken ion ythe line 8-8 of .Figure 4.

Figure `9 lis a 'top plan view of the cradle assembly.

Figure 101s a side elevational view ofthe cradle assembly,

.Figure '.11 'is aside elevational view of lthe cradle assemblyshowing'the vopposite side.

Figure `12 is a rear end elevation of the 'cradle assembly.

Figure 13 'isa front velevation 'of the shield support and armorplatesh'eld.

Figure v14 is a side elevation of the shield support and shield.

Figure 15 is a Section taken on the line |5-15 o'f Figure 14.

Figure '16 is a 'section 'taken on the line IB--IG off Figure '14.

Figure 1'7 is a 'top plan view of the counterbalance :arrangement forlighter barrel guns.

Figure 18 is a side elevation 'of the 'arrangement shown in Figure v17.

Figure v1"@ is `a 'detail vertical `section through the vvval'l of 'thepedestal support of a 'modied forrn of mount.

Figure "2`0 is ane'levation, partly in section, lof .another modiiiedform `or pedestal support.

Figure 21 is -an' lenlarged section through a further modified form Aofpedestal support.

Figure 22y is 'an enlarged section through yanother modified orm vofpedestal support.

The preferred .embodiment of the invention is illustrated in Figures 1to 18, inclusive. The gen-eral assembly of this mou-ntis shown inFigures l1--2 inclusive; The mount includes a vertical pedestalv supportor stand l adapted to support detachable legs Ziorming a tripod support.A trunnion bracket 3 is detachably secured to the upper 'endof theystand I. The upper ,portion of 'the'stand l is mounted for 'ro-tarymove- 'ment about 'the vertical yaxis of the stand so that -trunnion:bracket :3 is capable vof movement in a horizontal plane over 360.

TheA upper end o the trunnion bra'cketf vsupports the cradle ass'emiblyfor pivoting movement in a Vertical''plane'.y 'The Acradle assembly isadapted Lto carry 'a gun', such as `a ca'l...50 Brown- `ing'Wateracoqled .machine Agun 5 v(sh-own in broken lines). The cradleassembly 4 and gun may be elevated from minus 15 to plus 90.

The cradle assembly 4 further includes a trigger frame, indicatedgenerally by the reference numeral 6, a trigger side plate mechanism 'Iadapted to be secured to the side of the gun 5, a recoil mechanism 8(see Fig. 3), and a spent ammunition link chute 9. The cradle assembly 4is adapted to detachably receive an ammunition chest I (shown in brokenlines).

The trunnion bracket 3, at its base, is provided with means fordetachably receiving a shield support Il carrying an armor plate shieldI2 at its upper end.

The invention further includes a sighting assembly I3 adapted to besupported by clamping means I4 to the forward end of the barrel of thegun 5.

This mount, as can already be appreciated, is

- constructed of a number of separate assemblies or units which renderthe mount capable of easy transportation and quick assembling andequally facile disassembling.

In order to make clear the structural features of the mount, the variousunits and assemblies will be separately described.

Pedestal support or stand The stand I is comprised of a tubular memberI5 (Fig. 4) the lower end of which is provided with a circular baseplate I6. Disposed circumferentially around the lower end of the tubularmember I5 and welded to it and to the base plate I6 are three socket orleg housing members Il adapted tc receive the inner ends of the tubularlegs 2 (see Fig. 2).

The inner ends of the tubular legs 2 are adapted to be clamped in theleg housing members I'I by means of the clamping arrangement shown inFigures 4 and 5. This arrangement is comprised of two clamping jaws i8and I9 disposed on a shaft 20 passing through transverse openings in theleg housing member Il. One end of the shaft 20 is threaded through theclamping jaw I9 and a threaded locking collar 2I and locking pin 22 keep'the jaw from disengaging from the shaft. The other end of the shaftl 20is provided with a pivoted handle 23 which can be adjusted to permitoperation in a limited space to turn the shaft 20. The lower surface ofthe jaws I8 and I9 are fiat and having sliding arrangement with atransverse flat bar 24 rigid with the leg housing member I1.

It will be noted that turning of handle 23 in one direction will turnthe shaft 28 thus causing the jaws I8 and I 9 to be drawn together toclamp the leg 2 in the leg housing member. Operation of handle 23 in theother direction will move the jaws apart thus unclamping the leg 2.clamping means provides a quick, accurate and simple mechanism forclamping and unclamping the legs.

The pedestal support or stand I is provided with a trunnion bracketsupporting member 25 at its upper end. This member is mounted coaxiallyon the main portion of the pedestal stand I for rotary turning movementabout the vertical axis of the stand. The details of the structure areillustrated in Figures 4, 5, 6, 7 and 8.

Withrreference to Figures 4 and 7 it will be noted that the supportingmember 25 is itself supported by means of a bearing unit in thefollowing manner. The outer circumference of Vthe tubular member I5 isprovided with two spaced annular grooves which receive the rings Such a26, 21 (similar to piston rings). The reference numeral 28 indicates anannular channel bearing race housing which is secured to a ange 28 onthe lower end of the support 25. A four ring ball race 30 is disposedwithin the housing 28 but is vibration insulated therefrom by element28', 28" and 28 The vibration insulating element is of laminated clothand rubber material of the type generally known as Fabreeka. Thisbearing assembly is completed by the ball bearings 3I and the bolts 32,the latter serving to secure the housing 28 to the iiange 28 of thesupport 25. The support 25 is thus adapted to rotate 360 about thevertical axis of the pedestal stand I.

Means are provided for locking the support 25 in any position. Suchmeans is shown in Figures 4 and 8 particularly as comprising a handle 33Y mounted on a shaft 34 threaded in projection 35 extending laterallyfrom the support 25V and formed integrally therewith (see Fig. 8). Theinner end of the shaft 34 carries a clamping element 3S having a surfacecomplementary to the outer surface of the pedestal tube I5 and adaptedto bear against the same tightly when the handle 33 is actuated to turnshaft 34 in one direction. This locks the support 25 against rotarymovement. Actuation of the handle in the other direction moves the shaft34 and clamping element 36 out of engagement with the tubular member I5thus permitting free rotation of the support 25. The shaft 34 isprovided with a groove 3l and the limit screw 38 of lesser diameter thanthe width of the groove projects into this groove to prevent the shaft34 from being removed while still permitting limited movement suflicientto lock and unlock the support 25.

In accordance with an important feature of the invention a shockabsorber or dampener is disposed between the support 25 and the tubularmember I5. The structure embodying this is shown in Fig. 4. It includesan outer cone member 33 shaped substantially as a hollow diaboloprovided with a narrow slit from top to bottom. Two inner hollowfrusta-conical members 40 and 4I are adapted to t respectively in eachend of the diabolo 39. The conical member 40 is provided with a centralthreaded bore. Fiber composition packing pieces 42, 42 are disposedbetween the member 39 and the members 4I) and 4I. Each packing piece iscone-shaped and is provided with a slit from top to bottom. A bolt 43 isadapted to pass through members 4 I, 42, 42 and to be threaded in member4i! so as to draw the two members 4@ and 4I together thus clamping themto the member 39 with the ber composition pieces 42, 42 therebetween.The member 39 engages the inner wall of the tubular member I5. The lowermember 4e also engages this inner wall. The upper conical member 4Iengages the inner wall of the support 25.

The physical properties of the composition are important and shouldequal or closely approximate a composition known under the trade name ofFabreeka It is possible to employ two or more laminations of packingpieces and by this means and by adjusting the tightness of the bolt 43it is possible to obtain the desired preload. It has been demonstrated,the proper preload will have the effect of dampening the shock caused bynormal a3 when assembling and for adjustment :and a cover plate e4'normally `closes this opening.

The upper end of the support is provided with clamping means to enablethe trunnion bracket 3 to be removably secured thereto. Such clamp-.means (see Figs. 4 and 6) are vcomprised of three upstanding lugs `135,46 and 41, the lug (35 having a conical -recess andthe lugs l5 and 41each having an undercut recess as clearly noted in Fig. 4.

-The Mannion-bracket The trunnion bracket 3 is provided "at its lowerend 'with a pair of 'forwardly projecting lugs 438, e9 (Figs. 9 and lo)adapted-'to nest in the undercut recesses of the lugs 4t kand 4l on thesupport 25. The base of the 'trunnion bracket 3 is 'also provided with'a notch Y'59 (see Fig. 9) in which the rear lug et on the support '25is disposed when 'the trunnion bracket is positioned on the l support25.

A clamping bolt 52 threaded on its inner end and also provided with 'anoperating handle 53 (see Figs. 2 and3) which threaded into a bore 5|inthe ybase of the trunnion bracket -3. the handle 53 is turned lin onedirection the trunnion bracket 3 will be secured tightly to the support25, due to the fact that the end of bolt 52 engages the undercut portionkof lug l5 (Figs.

"4 `and 6) and lurges lugs i8 'and W9 of trunnion bracket '3 (Figs. 9and 1-0) more tightly into wedging vengagement with lugs 4t vand lll(Figs. 4 and 6). Y v Y The trunnion bracket 3 has two curved arms 511i,55 extending upwardly from each side of its base (see Fig. 9). Thegeneral outline oithese curved arms 5t, 55 is indicated in dotted linesin Fig. l. The upper `ends of these arms are p'rovided with `aligned'openings 'for receiving the tru-rmion'bearing pin 5S (Figs. l, 9 andl0) which comprises the pivot point -f-'o'r `permitting the cradleassembly 'l and gun 5 r(with the parts they carry) to pivot in lavertical plane, as will be described hereinafter. The trunnion bearingpin 5t comprises the principal means for supporting the 'cradle '4, gun5 (and parts carried thereby) 'on the carriage trunnion 3.

From Figs. 1, 9, 1o and'll in particular it will 'be 'seen that thetrunni'on bracket 3 carries clamping means for clamping the Y'cradle iwith respect to the trunnion bracket 3 thus locking the gun linelevation 'in any of "a plurality of its positions from minus to plus90. Such clamping means is 'comprised of a 'shaft 5l (Fig. 9) extendingthrough valigned 'openings in the "arrns 5d, 55 'of the trunni'onbracket 3 and provided on one "end with a clamping block 58 and athreaded nut 59, and 'on the other vend (Figs. 1, 9 'and 10) with vasimilar clamping block 50 and a pivoted operating handle A61. When theshaft "5l is turned 'in one 'direction by the handle 6I, 'the clampingblocks 58 and 5t bear against the side plates of the cradle 4 to lockthe cradle assembly with respect 'to the trunnion bracket 3.

Finally, the trunnion `bracket 3 lhas side brackets 62, 62 and 63, 63(Figs. :9, 10 and 1'1) with 'threaded holes 64, 65 adapted t'o receivebolts to secure the shield support lilY (Fig. 1) to the trun--nion-bracket 3 as will -be described.

The shield The armor plate shield lf2 and -its support H are shownparticularly in l, 2, 13, .1.4, 15

two uprli'glits Il, the upper ends for bend rearwardly.

The upper Vportion or .the armor plateshild l2 is welded to the '.rearside of 'the supports Il. The upper edge ofthe shield extends slightlyabove the upper `ends o'f supports Il so as to provide room 'for a weld`joint rat-6567(Fig.-.14). The lower 'portion of the shield l2 lis bentaway from the supports Il into a vertical plane. .From Figs. -2 and -13lit will be 'seen that the lone lower Cornel Of the Shield i'S olli,'away t() pl'vellt 1121*- terfere'nce with the vamrmmiti'on chest Il).

The .lower 'ends of the supports H are reinforced 'cn three faces Iby Aareinforcing member t?, andthe outer sides are eachprovided with -a notchE8 (see Figs. 13, '14 and T6). The inner `side of each support ll iscuit short as at 69.

With such an arrangement the lower :reinforced When and 316. The shield'assembly is comprised of' the t5 ends or the supports Il fare adaptedto be ire- -ceived by the side brackets 62, 62" and T63, 53' (Figs. 9,10 and 1`1) of the trunriion bracket '3 with bolts l'l, T9' (Fig. l)which pass through the notches 6'8l and into vthe threaded openings toand 55 respectively in the tru'nn-ion bracket -3. The arrangement isl'such that the shield support il can .be quickly and easily assembledand removed.

The cradle assembly The cradle assembly 4 is perhaps best rshown inFigs. 9, 1'0, 11 and T12. It is comprised grenerally of two parallelspaced Iside plates ll., lf2 bolted in spaced relation by the blocks 73,M of a recoil device, the details .ci which will :be described flater.

The forward lower edges lof the `side plates 1li and l2 'are out c'n theare foi a `circle the center l which is the pivot point-'5G aft'whichthe cradle is supported on the trunnion bracket 3 .for vertical pivotingmovement. vThese arcuate edges of the side plates H -and 'l2 ya-readapted to be clamped by the clamping means 5l, 53, 159., St, elpreviously described. The cradle assembly can thus be clamped at willany of the positions of its vertical ,pivoting movement.

The cradle .side plate 'l2 also carries an ammunition chest bracket l5while the vcradle side plate 'li supports the ammunition link chute 9.

The rear portion of the cradle .plate ll 'carries the trigger plateassembly 'It (Fig. 10) connected by arod 16 to a trigger operatingsystem which is carried by the tubular trigger frame e bolted to theside plates 1l., 1.2.

The tubular trigger :frame y6 is comprised of two endless tubularmembers l1, .18 disposed .in upright parallel planes (and --each ofwhich is bolted to a cradle side plate). and atubular rear cross supporti8 (see Fig. 9).

Each of the mem-bers il., 18,. is provided with series of brackets i9,T9 respectively, for supporting the operating handle grips Bil. All ofthe handle grips 88 carried by one of themembers '.ll, '58 are rotatablymounted 'and are .piv- Aotally attached to :an -arcuate connecting.member Se which is in turn connectedv to a. bell crank lever S2. Lever82' is connected to the trigger plate assembly T6 by -a rod 1'6" so'that actuation of any one of the `rotatable fhandle grips 8l! .ii-resthe gun. The gunner may thus control the gun entirely from a'standin'gposition since when the gun is elevated and the tubular trigger'fframeis depressed, `it .is only necessary tor itl-.le gunner to grasp a pairof handle gripsfdisposedvhlg'her up on the tubular trigger iframe@ fandoperate `the gun thereby.

The forward part of the tubular trigger frame B is adapted to carry asmall armor plate shield 81 which may be removably bolted thereto asseen for example in Figs. 9, and 11.

The trigger control mechanism just described and a modiiication thereofare described in greater detail and claimed in -copending application,Serial No. 516,520, filed December 31, 1943 (Patent No. 2,404,958).

The mount described is well balanced so that the gunner can rapidlyswing it through 360 in traverse and from minus 10 to 90 in elevation.Moreover, because of the tubular frame and the trigger firingarrangement, the gunner may operate at all times from a standingposition. The arrangement of the two shields I2 and 81 are such that thegunner is protected in all positions of re.

It will be noted that the arrangement described eliminates the necessityfor conventional shoulder braces and back strap and thus not onlyaiiords the gunner greater `freedom of movement, but also results inless shock recoil being transmitted to the gunner, both of which factorslead to quicker and more accurate operation.

From Fig. 1 it will be seen that the gun 5 is provided with a sightingarrangement comprising front and rear sights |05, 06, respectively,carried by a bracket arrangement adapted to be removably clamped to thewater jacket of the gun by the clamps |01, |08. The line of sightthrough sights 105, E06 (indicated by the broken line) extends slightlyabove the shield I2. This sighting arrangement is normally used only forinitial sighting after which, according to the usual practice, the gunis maneuvered as the result of watching the tracer bullets.

Counterbalance for lighter guns While the mount has so far beenillustrated and described as employed with a Browning cal. .50 watercooled machine gun, other types of guns may be employed. For example, itis possible to employ a heavy barrelled air cooled machine gun. Sincethe barrel of this gun is lighter than the water cooled barrel includingthe water jacket, the balance of mount would be disturbed. To compensatefor this lightness at the forward end of the gun, use may be had of acounterbalance weight such as illustrated in Figs. 17 and 18.

The counterbalance shown in Figures 17 and 18 is comprised or a benttubular member |09 adapted to carry at its outer end a weight whichadvantageously may be of pear shape. The weight IIO is provided with acentral passage to receive the tubular member |09 and after adjustmcntmay be secured to the member |09 by a tapered pin Hl passing downwardlythrough the weight and through a transverse bore in the member |09.

The other, inner end of the tubular member |09 is rigidly secured to arectangular block ||2 the width of which is equal to the distancebetween the cradle plates 1|, 12. The block II2 is provided withthreaded openings to receive the bolts i I3 which also are adapted topass through openings in the cradle plates 1I, 12. In this manner, theblock H2 can be quickly secured to the cradle plates when it is desiredto use the mount with a heavy barrel gun instead of the heavier watercooled gun.

The counterbalance compensates for the difference in weight at theforward end of the guns and Ythus Venables the gunner to maneuver themount with a heavy barrel gun with equal ease and facility.

M odz'fed forms Figures 19 through 22 disclose modified forms of mountshaving some features in common with the mount heretofore described.

In the modication shown in Fig. 19, the lower end of the trunnionbracket 203 corresponding to trunnion bracket 3 in the preferred form ofthe invention described in Figs. 1 through 16 is formed as a tubularmember 206 which is adapted to be disposed within the pedestal support20| corresponding to supporting member in the preferredform of theVinvention described in Figs. 1 through 16. The upper wall of thepedestal support 20| is of reduced thickness and a sleeve 201 isinterposed between the wall and the tubular member 206. A portion of thetubular member 206 and of the sleeve 201 is threaded as The sleeve 201is provided with a hole 209 for reception of a pin 2|0 which passesthrough the wall of the tubular support 20| and is under tension of theleaf spring 2| I.

The tubular member 206 is provided with an inward bulge 2|2 to make roomfor the annular recess 2I3 which is engaged by a spring pressed lug 2 I4carried by the tubular support 20|. This lug 2 I4 normally retains themember 206 in operative position in which it may rotate about itsvertical axis but cannot be drawn upwardly. The lug 2 I4 may bedisengaged by moving handle 2I5 thus permitting the member 206 to beremoved.

In the modication shown in Fig. 20 the trunnion bracket 242 is providedwith a cylindrical portion 243 adapted to extend downwardly within thepedestal support 244. The cylindrical portion 243 is supported forrotary movement within the pedestal support 244 by the member 245 whichis provided with frusto-conical ends 245, 241.

The end 246 is provided with a shoulder 248 which rests on the upperedge of the pedestal support 244. This end 246 is also provided with acircular cut-out 249 in which the bearings 250 are disposed. A shoulder25| on the trunnion bracket 242 rests on the bearings.

The end 241 is provided with a hole 252 adapted to receive a springpressed pin 253 which retains the member 245 in place.`

The member 245 is formed of outer and inner pieces, the inner piecehaving the reference numeral 245. At its lower end, inner piece 245 isthreaded to receive a ring nut 254 having a beveled surface which isseparated from the other piece by a cushioning means 255 and a steelcone 255'. The cushioning means 255 is preferably of material having thesame characteristics as the insulation pads 42, 42 in the embodiment ofFig. 4. A plate 256 is secured to the cylindrical portion 243 by meansof the bolt 251 and keeps the cylindrical portion 243 from risingupwardly with respect to the member 245.

The two parts of member 245 at its upper end are separated by a similarcushioning means 240 and a steel cone 246".

The two part construction of element 245, 245', together with cushioningmeans 255 and 246', provides a shock absorbing mounting for cylinder 243which supports the gun, and thereby increases the accuracy of nre.

Figure 21 shows an adapter for use in the arrangement of Fig. 19 so thata trunnion bracket for a diierent type machine gun may be used in placeof trunnion bracket 203 (Fig. 19)

As shown in Fig. 21, the trunnion bracket 258 is provided with a longdownwardly extendingr cylindrical portion 259 which is supported forrotation by tapered bearings 260, 26| supported by the adapter sleeve262 having a iiared upper end.

Concentric with the sleeve 262 and surrounding the latter is a secondadapter sleeve 263 which in turn fits within sleeve 201 within thecylindrical wall of the pedestal support 20|. The lower end of thesleeve 262 is threaded to receive the threaded ring 264 which bearsagainst the lower edge of sleeve 263.

The upper end of the cylindrical portion 259 is sealed by the sealingmeans 265.

The lower end of the cylindrical portion 259 is threaded to receive tworing nuts 266, 261 disposed within a sealed housing 268 held in place bythe wire ring 269.

It will be observed that the use of the adapter sleeves 262 and 263 andparts carried thereby readily permit the pedestal support 20| to receivea trunnion bracket 258 (Fig. 21) differing from trunnion bracket 203(Fig. 19), thus rendering a single pedestal support 20| capable of usewith trunnion brackets for different types of guns.

Fig. 22 illustrates a form of pedestal support which embodies some ofthe features of the types shown in Figures 20 and 21. Like Figure 21,this new embodiment includes a trunnion bracket 258 having a downwardlydepending shaft 259 which is rotatably mounted in a sleeve 262 by meansof the bearings 260 and 26|. Like Figure 21 this new embodiment isprovided with ring nuts 266 and 261, housing 268 and wire ring 269. Alsolike Figure 21 the sleeve 262 is disposed within pedestal support 20|.It is, however, held in spaced relation to the pedestal support by meanssimilar to that employed in Figure 20.

These means comprise the member 210 which has frusto-conical top andbottom ends. The top end has a shoulder 21| engaged by the upper end ofthe pedestal support 20|. The lower end of member 210 rests within thepedestal support 20| and is removably held in place by means of thespring pressed pin 212 adapted to engage in a hole in member 210.

At its upper end the member 210 abuts the ared upper end of the sleeve.A cushioning pad 213 and steel cone 214 similar to those employed inFigure 20 are disposed between the two.

At its lower end the sleeve 262 is threaded to receive a beveled nut215. A cushioning pad 216 and steel cone 211 separate the beveledsurface of the nut from the lower frusto-conical end of the member 210.The cushioning means and cone are similar to those already described.

It will be obvious that the structure can be easily assembled and thatthe eiect of the cushioning means can be adjusted by tightening the nut215. Here, as in the previously described embodiments having thecushioning feature, the construction which includes members 262 and 210and cushioning pads 213 and 216, provides absorption of vibration whichincreases the accuracy of re.

10 While several preferred embodiments of the invention have beenillustrated and described, it is to be understood that changes instructure and arrangement may be made without departing from theinventive concepts which are only to be limited to the extent dened inthe following claims.

. What is claimed is:

1. In a gun mount, a standard including an upright tubular element, amember mounted over and covering the upper end of said tubular element,said member being mounted for rotation about the axis of said element,means on the upper end of said member for detachably receiving gunsupporting means, and shock absorbing means in the mounting between saidtubular element and said member, said shock absorbing means includingouter cone-shaped means bearing against the inner wall of said tubularelement, inner cone-shaped means bearing against the inner wall of saidmember at the top thereof and vibration insulation means between saidouter and inner cone-shaped means.

2. In a gun mount, a standard including an upright tubular element, amember mounted over and covering the upper end of said tubular element,said member being mounted for rotation about the axis of said element,means on the upper end of said member for detachably receiving gunsupporting means, and shock absorbing means in the mounting between saidtubular element and said member.

3. In a gun mount, a standard including an upright tubular element, amember mounted over and covering the upper end of said tubular element,said member being mounted for rotation about the axis of said element,means on the upper end of said member for detachably receiving gunsupporting means, shock absorbing means in the mounting between saidtubular element and said member, said shock absorbing means includingouter cone-shaped means bearing against the inner wall of said tubularelement, inner cone-shaped means bearing against the inner wall of saidmember at the top thereof and Vibration insulation means between saidouter and inner cone-shaped means, and adjustable means for placing theinsula tion means under a predetermined pressure.

SAMUEL G. GREEN. WALTER H. DARDENNE. WUJLIAM J. MEINEL. WEBER DEVORE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,608,595 Green et al. Nov. 30,1926 1,611,814 Butler Dec. 21, 1926 1,625,124 Jervey et al Apr. 19, 19272,030,889 Negrotto Feb. 18, 1936 2,415,340 DArdenne et al. Feb. 4, 194'?FOREIGN PATENTS Number Country Date 118,132 Great Britain Aug. 12, 1918241,083 Great Britain Oct. 15, 1925

